Method for recovering and partially upgrading bitumen from oil sands, tar sands, oil shales, h eavy oil reservoirs
CA 2000251 A1 · Owner: Berkowitz, Norbert · Inventors: Berkowitz, Norbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for recovering and partially converting bitumen kerogen and/or, heavy oils to lighter hydrocarbons by extraction with (nominally) supercritical water is described. In one version of the process steam at, 400-475°C is continuously injected into the pay-zone under a pressure of 7-21 MPa, and taken off through back-pressure valves into a pressure let-down vessel where the extract falls out. Optimum extraction temperatures are induced by supplemental electrical heating or by combustion of part of the in-place organic matter. In the other version the bitumen, kerogens and/or, heavy oils produced by conventional steam-flooding techniques are partially upgraded and separated from …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 6, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.